Remove websocket.Dialer from Client

mastodon.go

@@ -13,8 +13,6 @@ import (
 	"path/filepath"
 	"strings"
 	"time"
-
-	"github.com/gorilla/websocket"
 )
 
 // Config is a setting for access mastodon APIs.
@@ -28,7 +26,6 @@ type Config struct {
 // Client is a API client for mastodon.
 type Client struct {
 	http.Client
-	websocket.Dialer
 	config   *Config
 	interval time.Duration
 }